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Effect of a B agonist on the Partition of protein between wool and other tissues in sheep

Published online by Cambridge University Press:  24 November 2017

J E Nash ,
J F D Greenhalgh  and
M Birnie
J E Nash
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J F D Greenhalgh
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
M Birnie
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
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Extract

In growing lambs a high proportion of protein retained (0.2-0.3) may be stored in wool. Protein retention is known to be increased by treating sheep with B agonists and there are indications that the extra protein is stored mainly in the carcass (Williams, 1987; Fiems, 1987). Wool growth rate at any time is determined by the relative availability of nutrients to all body tissues and is affected by, for example, pregnancy. It is also dependent on the kinetics of all competing biochemical reactions, which are altered by hormones (Black and Reis, 1979).

To investigate the partition of protein between wool and other body tissues, a nitrogen balance trial was carried out with lambs fed on a diet with or without the B agonist, Cimaterol (Boehringer Ingelheim, Ingelheim, West Germany).

Type
Sheep production
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1990 , March 1990 , pp. 35
Copyright
Copyright © The British Society of Animal Production 1990

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References

Black, J L and Reis, P J (1987) Speculation on the control of nutrient partition between wool growth and other body functions. In Physiological and Environmental Limitations to Wool Growth ed. Black, J L and Reis, P J. Armidale.Google Scholar
Brody, S (1945) Bioenergetics and Growth. Reinhold, New York.Google Scholar
Fiems, L O (1987) Review: Effect of beta-adrenergic agonists in animal production and their mode of action. Ann. Zootech. 36, 271–290.Google Scholar
Williams, P E V (1987) The use of B agonists as a means of altering body composition in livestock species. Nutr. Abstr. Rev. (Series B) 57, 453–464.Google Scholar